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Chemcial Industry and Engineering 2023, Vol. 40 Issue (4) :129-136    DOI: 10.13353/j.issn.1004.9533.20220850
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Optimization of heterogeneous Fenton treatment of organic complexes in electroplating wastewater based on response surface methodology
ZHAO Jin, CHENG Yu, JIANG Tianxiang, CAO Junrui
The Institute of Seawater Desalination and Multipurpose Utilization, Tianjin 300192, China

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Abstract In order to improve the catalytic efficiency and optimize the operating conditions of heterogeneous Fenton process for electroplating wastewater treatment, a supported fly ash heterogeneous Fenton catalyst was prepared by using phthalic acid and hydrochloric acid as the buffer solution. And the effect of factors, such as catalyst dosage, initial pH value and H2O2 dosage on the catalytic efficiency of organic complexes in electroplating wastewater were investigated, respectively. On the basis of single factor experiments, the Box-Behnken Design response surface methodology was used to optimize the experimental design, the optimized conditions and the interaction between multiple factors were obtained by model construction and variance analysis, and then the accuracy of the model was verified. The results show that the order of influence of various factors on the removal rate of CODCr in electroplating wastewater is as follows: initial pH value>catalyst dosage>H2O2 concentration, and the significant interaction occurred between initial pH value and H2O2 concentration. Moreover, the optimal reaction conditions are as follows: catalyst dosage 16.86 g·L-1, initial pH value 3.49, H2O2 concentration 50.6 mmol·L-1. Furthermore, the average actual value of CODCr removal rate is 94.2%, which the relative error only 0.95% compared with predicted value. Therefore, it is feasible to optimize heterogeneous Fenton degradation of organic complexes in electroplating wastewater by response surface methodology.
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ZHAO Jin
CHENG Yu
JIANG Tianxiang
CAO Junrui
Keywordsresponse surface method   heterogeneous Fenton   electroplating wastewater   buffer solution   fly ash   organic complex     
Received 2022-12-26;
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ZHAO Jin, CHENG Yu, JIANG Tianxiang, CAO Junrui.Optimization of heterogeneous Fenton treatment of organic complexes in electroplating wastewater based on response surface methodology[J]  Chemcial Industry and Engineering, 2023,V40(4): 129-136
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